Chapter 5
5-6
Troubleshooting
■ Alarm Table
Note These alarms are not displayed on the alarm indicator on the front of the Servo Driver. They
appears on the display of the Parameter Unit.
Code ALM Error detection function Cause of error
Alarm A.04 OFF Parameter setting error The Servomotor does not match the
Servo Driver.
A.10 OFF Overcurrent Overcurrent detected, or improper radi-
ation shield temperature rise detected.
A.30 OFF Regeneration error Regeneration circuit damaged due to
large amount of regenerative energy.
A.32 OFF Regeneration overload Regenerative energy exceeded the
regeneration resistance.
A.40 OFF Overvoltage/undervoltage Main circuit DC voltage outside the
allowable range.
A.51 OFF Overspeed Servomotor rotation speed exceeded
the maximum speed.
A.70 OFF Overload Output torque exceeded 120% of rated
torque.
A.73 OFF Dynamic brake overload Regenerative energy exceeded the
dynamic brake resistance during
dynamic brake operation.
A.74 OFF Inrush resistance over-
load
Inrush current exceeded the inrush
resistance during power supply inrush.
A.7A OFF Overheat Abnormal temperature rise detected in
radiation shield.
A.bF OFF System error A control circuit system error was
detected.
A.C1 OFF Runaway detected The Servomotor rotated in the opposite
direction from the command.
A.C2 OFF Phase error detected The Servomotor’s electrical angle was
incorrectly detected
A.C3 OFF Encoder disconnection
detected
Encoder phase A, B, or S is discon-
nected or shorted.
A.d0 OFF Deviation counter over-
flow
Deviation counter’s residual pulses
exceeded the deviation counter over-
flow level set in Pn505.
CPF00 --- Parameter Unit transmis-
sion error 1
Data could not be transmitted after the
power supply was turned ON. (See
note.)
CPF01 --- Parameter Unit transmis-
sion error 2
Transmission timeout error (See note.)
Warning A.91 --- Overload A warning occurs before the overload
alarm (A.70) is reached. An alarm may
be generated if the Servomotor contin-
ues to operate.
A.92 --- Regeneration overload A warning occurs before the regenera-
tion overload alarm (A.32) is reached.
An alarm may be generated if the Ser-
vomotor continues to operate.